C examples updates needed

[mahlonsmith]

Description

The C examples, such as on the Getting Started page, seem to reference an old API where various calls return values instead of KuzuSuccess/KuzuError:

kuzu_database *db = kuzu_database_init("test", config);

as an example, vs

kuzu_database db;
kuzu_database_init( ":memory:", config, &db );

(Lots of other calls, same deal.)

Link

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